The headline last month, published "hand-carved watch is a long history of handicrafts, skeleton hollow more modern, smart watch is not working," introduced the carved hollow watch and skeleton hollow skeleton watch difference. The conclusion is that prefabricated hollow skeleton is more abstract than the modern, but hand-carved hollow watch is even more (manual) value. I use both the Patek Philippe and Vacheron Constantin tables to explain the difference between these two names. Engraving and hollowing actually have the difference, most people do not understand, that more transparent through the sculpture Another way to say something intuitively, one is called openwork (this must be manual); one called hollow (this can be prefabricated). Openwork, the original meaning of French more accurate, called ajouré, translated into Chinese called hollow. The skeleton is Squelette. This is two different meaning of the word, it is clear by the people who like to express unity as a hollow. I hope my readers will be able to distinguish between the two processes in the future. Broadly speaking, the movement of the splint is transparent can be called hollow. Traditionally hollow movement is in the original movement plywood with a wire saw and other tools cut off part of the metal derived. With the development of technology (such as digital processing center), some watch factory in the design of the movement, the need to draw the hollow out of place, when processing the splint can be hollowed out. More modern play is to redesign the hollow plywood layout, in order to achieve the optimal hollow structure. Luxury (Luxury) pay attention to cultural heritage, senior watch play is traditional. The most traditional hollow watch, nature is pure hand-made. Said pure hand, but pure hand in the end where used? Or, what place more value by hand? With this in mind, I found a specific case at BASELWORLD this year. Patek Philippe hollow watch launched a new rose gold models Patek Philippe Calatrava 5180 1R 001, I introduced this style platinum version. This year Patek Philippe launched a rose gold version. Careful observation of the scene and found that this form of hollow, it is hand-carved, at the same time in the carved splint chamfer polishing and hand carved. Engraved so transparent, that the brand name PATEK and PHILIPPE were engraved on both sides of the splint (see below). Because 2017 is the 40th anniversary of the Patek Philippe Caliber 240 Slim Self-Winding Movement, the engraving symbol of Patek Philippe's signature is automatically added for the first time. This movement is completely handcrafted in three different ways: hollow, decorative and carved (ajouré, décoréet gravé). A single gravé process takes 130 hours. This watch is designed to watchmaking workshop has always devoted effort, heritage and carry forward the tribute to the rare craft. In addition to the plywood openwork, but also chamfer grinding plywood and engraved on the splint. This is a real manual hollow Vacheron Constantin simply put a hollow case called "Openwork" Vacheron Constantin Métiers d'Art (Master of Arts) Mécaniques Ajourées Lourning mechanical watches is Vacheron Constantin's first attempt to engrave classic homemade movement. Hundreds of hours of uncompromising attention not only gives the movement an elegant, thin profile, but also incorporates the most complete functionality. In the 4400 solid movement successfully dredged nearly half of the material. They set a new milestone in ancient art of hand-carving. Before using the file for manual grinding and chamfering, the sculptor abandoned the previous practice of engraving the mainboard and the splint with a micro hand saw and carefully carved the entire circumference of the movement to create a true three-dimensional and comparable movement of sculpture. Openwork is not enough, but also in the splint left engraved, this is ajouré